if you are comfortable running python scripts: https://github.com/andreblue/doc-breaker I also have many many more word lists. I'd be happy to give it a shot if the contents are not too sensitive.
I ran that exact script and it output that it found the password and that it was 123456. It was not 123456. The "unlocked document" it generated cannot even be opened. If you have an idea how that might be fixed I'd gladly take that and the password list(s). Don't wanna share the document however, since I have entirely forgotten what's in it, so it may or may not be sensitive